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ARS Home » Plains Area » Las Cruces, New Mexico » Cotton Ginning Research » Research » Publications at this Location » Publication #290801

Title: Unloading system total particulate emission factors and rates for cotton gins

item BUSER, MICHAEL - Oklahoma State University
item Whitelock, Derek
item Boykin Jr, James
item Holt, Gregory

Submitted to: World Wide Web
Publication Type: Other
Publication Acceptance Date: 1/28/2013
Publication Date: 1/28/2013
Citation: Buser, M.D., Whitelock, D.P., Boykin Jr, J.C., Holt, G.A. 2013. Unloading system total particulate emission factors and rates for cotton gins. National Cotton Gin Technical Reports. Report #OSU12-29. Available:

Interpretive Summary:

Technical Abstract: This manuscript is part of a series of manuscripts that characterize cotton gin emissions from the standpoint of stack sampling. The impetus behind this project was the urgent need to collect additional cotton gin emissions data to address current regulatory issues. A key component of this study was focused on EPA total particulate emission factors. EPA AP-42 emission factors are generally assigned a rating that is used to assess the quality of the data being referenced. The ratings can range from A (Excellent) to E (Poor). EPA current total particulate emission factor quality ratings for cotton gins are extremely low. Cotton gins received these low ratings because the data was collected almost exclusively from a single geographical region. The objective for this study was to collect additional total particulate emission factor data, based on the EPA approved stack sampling methodology, for unloading systems from cotton gins located in regions across the cotton belt. The project plan included sampling seven cotton gins across the cotton belt. Key factors for selecting specific cotton gins included: 1) facility location (geographically diverse), 2) industry representative production capacity, 3) typical processing systems and 4) equipped with properly designed and maintained 1D3D cyclones. Three of the seven gins had unloading systems. In terms of capacity, the three gins were typical of the industry; averaging 24.7 bales/hr during testing. The average measured total particulate emission factor based on three tests (9 total test runs) was 0.134 kg/bale (0.296 lb/bale). The emission rate from test averages ranged from 1.56 to 3.93 kg/hr (3.43 to 8.67 lb/hr).